28519930 has 16 divisors (see below), whose sum is σ = 51490080. Its totient is φ = 11373712.

The previous prime is 28519927. The next prime is 28519943. The reversal of 28519930 is 3991582.

It is a self number, because there is not a number n which added to its sum of digits gives 28519930.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 640 + ... + 7579.

It is an arithmetic number, because the mean of its divisors is an integer number (3218130).

Almost surely, 2^28519930 is an apocalyptic number.

28519930 is a deficient number, since it is larger than the sum of its proper divisors (22970150).

28519930 is a wasteful number, since it uses less digits than its factorization.

28519930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8573.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 28519930 is about 5340.4054153219. The cubic root of 28519930 is about 305.5269221776.

The spelling of 28519930 in words is "twenty-eight million, five hundred nineteen thousand, nine hundred thirty".